I wrote a wallet client which takes some of the stuff I'd learned while looking at Merkalized Abstract Syntax Tree's and Schnorr signatures, and applied this concept more generally to secp256k1 Elliptic Curve:

https://medium.com/@jamie.brian.gilchrist/my-new-wallet-client-txtailor-a-twist-on-cryptographic-key-tweaking-inspired-by-bitcoins-83233795feb1


I'd be interested to see what people make of the tool. It is quite flexible, and works across any chain using the secp256k1 EC.